1250121620 has 24 divisors (see below), whose sum is σ = 2863915488. Its totient is φ = 454589600.

The previous prime is 1250121619. The next prime is 1250121629. The reversal of 1250121620 is 261210521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1250121592 and 1250121601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1250121629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840966 + ... + 2841405.

It is an arithmetic number, because the mean of its divisors is an integer number (119329812).

Almost surely, 2^1250121620 is an apocalyptic number.

1250121620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1250121620 is an abundant number, since it is smaller than the sum of its proper divisors (1613793868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1250121620 is a wasteful number, since it uses less digits than its factorization.

1250121620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682391 (or 5682389 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1250121620 is about 35357.0589840275. The cubic root of 1250121620 is about 1077.2522801959.

The spelling of 1250121620 in words is "one billion, two hundred fifty million, one hundred twenty-one thousand, six hundred twenty".